var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');

var adminRouter = require('./routes/admin');
var dormRouter = require('./routes/dorm');
var noticeRouter = require('./routes/notice');
var studentRouter = require('./routes/student');
var loginRouter = require('./routes/login');

var app = express();

/* CORS  解决跨域问题 */
/* 拦截所有请求，给他一个处理函数 */
app.all('*', function(req, res, next) {
    /* 设置响应头，允许所有网站都可以请求 */
    res.header('Access-Control-Allow-Origin', '*');
    /* 设置我们的请求方式可以有以下这些 */
    res.header('Access-Control-Allow-Methods', 'GET, POST, PUT, DELETE');
    /* 设置响应头可以有以下这些 */
    res.header('Access-Control-Allow-Headers', 'Content-Type,Content-Length, Authorization, Accept,X-Requested-With');
    /* 放行 */
    next();
});


// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

app.use('/admin', adminRouter);
app.use('/dorm', dormRouter);
app.use('/notice', noticeRouter);
app.use('/student', studentRouter);
app.use('/login', loginRouter);


// catch 404 and forward to error handler
app.use(function(req, res, next) {
    next(createError(404));
});

// error handler
app.use(function(err, req, res, next) {
    // set locals, only providing error in development
    res.locals.message = err.message;
    res.locals.error = req.app.get('env') === 'development' ? err : {};

    // render the error page
    res.status(err.status || 500);
    res.render('error');
});

module.exports = app;